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전통적 알고리즘 교수법과 다양한 표상을 활용한 교수법의 비교: 분수, 소수, 퍼센트 내용을 중심으로
한선영,Raymond FLORE,Esther KOONTZ,Fethi INAN 대한수학교육학회 2016 학교수학 Vol.18 No.2
The purpose of this study was to investigate the impact of multiple representations on students’ understanding of fractions, decimals, and percent. The instructional approach integrating multiple representations was compared to traditional algorithmic instruction, a form of direct instruction. To examine and compare the impact of multiple representations instruction with traditional algorithmic instruction, pre and post tests consisting of five similar items were administered with 87 middle school students. Students’ scores in these two tests and their problem solving processes were analyzed quantitatively and qualitatively. The quantitative results indicated that students taught by traditional algorithmic instruction showed higher scores on the post-test than students in the multiple representations group. Furthermore, findings suggest that instruction using multiple representations does not guarantee a positive impact on students’ understanding of mathematical concepts. Qualitative results suggest that the limited use of multiple representations during a class may have hindered students from applying their use in novel problem situations. Therefore, when using multiple representations, teachers should employ more diverse examples and practice with multiple representations to help students to use them without error. 본 연구는 수학의 다양한 표상이 학습자의 분수, 소수 및 퍼센트에 대한 이해에 어떤 영향을 주는지 분석하는 것을 목적으로 하였다. 다양한 표상을 활용한 교수법을 전통적 알고리즘 교수법과 비교하고자 87명의 중학교 학생들을 대상으로 사전, 사후 검사를 실시하였다. 사전, 사후 검사는 각각 5개의 비슷한 문항으로 구성되었으며, 문항에 대한 학생들의 답안을 양적, 질적으로 분석하였다. 양적 분석 결과에 따르면, 전통적 알고리즘 교수법으로 지도 받은 학생들이 다양한 표상을 활용한 교수법에 의해 지도받은 학생들에 비하여 높은 점수를 나타내었다. 또한, 다양한 표상을 활용한 교수법이 학생들의 수학적 개념에 대한 이해를 보장해 주지는 못함이 드러났다. 질적 분석 결과에 따르면, 수학 교실에서 다양한 표상을 제한적으로 활용할 경우, 오히려 다양한 수학적 표상은 학생들이 문장제 문제를 푸는 과정에서 응용을 방해하는 것으로 나타났다. 본 연구 결과에 따르면, 교사는 수학 교실에서 다양한 표상을 활용함에 있어서 반드시 여러 가지 예시와 연습을 통해 학습자들이 다양한 표상을 제대로 이해하고, 연습할 수 있도록 도와야 할 것이다.
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Human Ribosomal Protein L18a Interacts with hnRNP E1
한선영,최미영 한국통합생물학회 2008 Animal cells and systems Vol.12 No.3
Heterogeneous nuclear ribonucleoprotein E1 (hnRNP E1) is one of the primary pre-mRNA binding proteins in human cells. It consists of 356 amino acid residues and harbors three hnRNP K homology (KH) domains that mediate RNA-binding. The hnRNP E1 protein was shown to play important roles in mRNA stabilization and translational control. In order to enhance our understanding of the cellular functions of hnRNP E1, we searched for interacting proteins through a yeast two-hybrid screening while using HeLa cDNA library as target. One of the cDNA clones was found to be human ribosomal protein L18a cDNA (GenBank accession number BC071920). We demonstrated in this study that human ribosomal protein L18a, a constituent of ribosomal protein large subunit, interacts specifically with hnRNP E1 in the yeast two-hybrid system. Such an interaction was observed for the first time in this study, and was also verified by biochemical assay. Heterogeneous nuclear ribonucleoprotein E1 (hnRNP E1) is one of the primary pre-mRNA binding proteins in human cells. It consists of 356 amino acid residues and harbors three hnRNP K homology (KH) domains that mediate RNA-binding. The hnRNP E1 protein was shown to play important roles in mRNA stabilization and translational control. In order to enhance our understanding of the cellular functions of hnRNP E1, we searched for interacting proteins through a yeast two-hybrid screening while using HeLa cDNA library as target. One of the cDNA clones was found to be human ribosomal protein L18a cDNA (GenBank accession number BC071920). We demonstrated in this study that human ribosomal protein L18a, a constituent of ribosomal protein large subunit, interacts specifically with hnRNP E1 in the yeast two-hybrid system. Such an interaction was observed for the first time in this study, and was also verified by biochemical assay.
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한선영,문소정,배성숙,노희진 한국치위생학회 2018 한국치위생학회지 Vol.18 No.1
Objectives: The aims of this study were to analyze the job stress of clinical hygienists according to their positional system and to confirm its relevance. Methods: Seven hundred seventy six clinical dental hygienists participated in this survey. The questionnaire items consisted of general characteristics, working environment, and job stress. The data analysis was performed using IBM SPSS statistics ver.23.0 software. Results: Among the job stresses, the stress on the job demands was the highest with 63.4 points, and the stress on interpersonal conflict was the lowest with 34.6 points. The total score of job stress was the highest in the 26-30 year-old age group, and major stress factors in this group were job insecurity, organizational system, and lack of reward. Team members were more stressful about insufficient job control, organizational system, and lack of reward than team managers, while team managers were more likely to score interpersonal conflict. The dental hygienists in the hospitals that did not have the positional system got more stressed in the insufficient job control, organizational system, and lack of reward area. Conclusions: The presence of positional system was related to job demand, insufficient job control, organizational system, and lack of reward. Structural efforts such as establishing a proper positional system in dental clinics will be needed to control job stress in the clinical dental hygienists.
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한선영,Han, Seon-Yeong 한국정보통신집흥협회 1997 정보화사회 Vol.109 No.-
인류의 역사가 시작된 이래로 정보의 중요성을 가장 크게 부각시킨 것은 아마도 인터넷이라는 전산망일 것이다. 정보의 홍수속에 살아가고 있는 현대인에게는 하루가 다르게 밀려드는 정보를 "어떻게 정리할 것인가?"하는 문제도 새로운 의미로 받아들여진다. 하지만 정작 그 많은 정보를 정리하려 할 때 커다란 한계를 느끼게 된다. 너무나 다양한 정보들의 양에 그리고 많은 정보를 어디에 어떻게 정리할 것인가? 하는 방법론적인 문제의 어려움에 봉착할 것이 뻔하기 때문인 것이다. 이러한 문제의 해결방안으로 컴퓨터를 이용한 빠른 검색과 정리에 이르렀으며 시대적 요청으로 간주되었다. 또한 컴퓨터통신의 발전으로 전세계에 흩어져 있는 수많은 정보의 교류는 더욱 더 활발해져가고 있다. 하지만 이렇게 구성된 다양한 정보망에서 원하는 정보를 찾기란 그다지 쉬운 일은 아니다.
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